Finding the Fourth Proportional to 37,782.72, 52,139.30 and 20,787.30

Step by Step Solution

1. Step 1: Write the proportion equation
   37,782.72 : 52,139.30 = 20,787.30 : x
2. Step 2: Convert to fraction form
   37,782.72/52,139.30 = 20,787.30/x
3. Step 3: Cross multiply
   37,782.72x = 52,139.30 × 20,787.30
4. Step 4: Simplify right side
   37,782.72x = 1,083,835,166.95
5. Step 5: Solve for x
   x = 1,083,835,166.95/37,782.72
6. Step 6: Final answer
   x = 28,686.00